package com.zby.bi.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zby.bi.common.ErrorCode;
import com.zby.bi.constant.CommonConstant;
import com.zby.bi.dao.UserDao;
import com.zby.bi.entity.UserEntity;
import com.zby.bi.entity.Vo.user.UserQueryRequest;
import com.zby.bi.entity.dto.LoginUserDto;
import com.zby.bi.entity.dto.UserVO;
import com.zby.bi.entity.enums.UserRoleEnum;
import com.zby.bi.exception.BusinessException;
import com.zby.bi.service.UserService;
import com.zby.bi.utils.SqlUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import static com.zby.bi.constant.UserConstant.USER_LOGIN_STATE;

@Slf4j
@Service("userService")
public class UserServiceImpl extends ServiceImpl<UserDao, UserEntity> implements UserService {
    private static final String SALT = "zby";
    @Resource
    private RedisTemplate redisTemplate;

    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userAccount, userPassword, checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账号过短");
        }
        if (userPassword.length() < 6 || checkPassword.length() < 6) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        // 密码和校验密码相同
        if (!userPassword.equals(checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "两次输入的密码不一致");
        }
        synchronized (userAccount.intern()) {
            // 账户不能重复
            QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("userAccount", userAccount);
            long count = this.baseMapper.selectCount(queryWrapper);
            if (count > 0) {
                throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号重复");
            }
            Random random=new Random();
            int i = random.nextInt();
            String md5DigestAsHex = DigestUtils.md5DigestAsHex(String.valueOf(i).getBytes());
            String username = md5DigestAsHex.substring(0, 5);
            // 2. 加密
            String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
            // 3. 插入数据
            UserEntity user = new UserEntity();
            user.setUserAccount(userAccount);
            user.setUserPassword(encryptPassword);
            user.setUserName("昵称"+username);
            boolean saveResult = this.save(user);
            if (!saveResult) {
                throw new BusinessException(ErrorCode.SYSTEM_ERROR, "注册失败，数据库错误");
            }
            return user.getId();
        }
    }

    @Override
    public long userRegister(UserEntity userEntity) {
        String userAccount = userEntity.getUserAccount();
        String userPassword = userEntity.getUserPassword();
        if (StringUtils.isAnyBlank(userAccount, userPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账号过短");
        }
        if (userPassword.length() < 6 ) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        synchronized (userAccount.intern()) {
            // 账户不能重复
            QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("userAccount", userAccount);
            long count = this.baseMapper.selectCount(queryWrapper);
            if (count > 0) {
                throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号重复");
            }
            if (StringUtils.isBlank(userEntity.getUserName())){
                Random random=new Random();
                int i = random.nextInt();
                String md5DigestAsHex = DigestUtils.md5DigestAsHex(String.valueOf(i).getBytes());
                String username = md5DigestAsHex.substring(0, 5);
                userEntity.setUserName("昵称"+username);
            }
            // 2. 加密
            String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
            // 3. 插入数据
            userEntity.setUserPassword(encryptPassword);
            boolean saveResult = this.save(userEntity);
            if (!saveResult) {
                throw new BusinessException(ErrorCode.SYSTEM_ERROR, "注册失败，数据库错误");
            }
            return userEntity.getId();
        }
    }

    @Override
    public LoginUserDto userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userAccount, userPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号错误");
        }
        if (userPassword.length() < 6) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "密码错误");
        }
        // 2. 加密
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        // 查询用户是否存在
        QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);
        UserEntity user = this.baseMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            log.info("user login failed, userAccount cannot match userPassword");
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户不存在或密码错误");
        }
        // 3. 记录用户的登录态
        request.getSession().setAttribute(USER_LOGIN_STATE, user);
//        redisTemplate.opsForValue().set(USER_LOGIN_STATE, user);
//        redisTemplate.expire(USER_LOGIN_STATE, 86400, TimeUnit.SECONDS);
        return this.getLoginUserVO(user);
    }

    @Override
    public LoginUserDto getLoginUserVO(UserEntity user) {
        if (user == null) {
            return null;
        }
        LoginUserDto loginUserDto = new LoginUserDto();
        BeanUtils.copyProperties(user, loginUserDto);
        return loginUserDto;
    }
    /**
     * 获取当前登录用户
     *
     * @param request
     * @return   4caff9cc-70ba-4bf7-b188-b90ade878ed7
     */
    @Override
    public UserEntity getLoginUser(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
        log.info(request.getRequestedSessionId());
        log.info(request.getSession().getId());
//        Object userObj = redisTemplate.opsForValue().get(USER_LOGIN_STATE);
        UserEntity currentUser= (UserEntity) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
//         从数据库查询（追求性能的话可以注释，直接走缓存）
//        long userId = currentUser.getId();
//        currentUser = this.getById(userId);
//        if (currentUser == null) {
//            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
//        }
        return currentUser;
    }

    /**
     * 获取当前登录用户（允许未登录）
     *
     * @param request
     * @return
     */
    @Override
    public UserEntity getLoginUserPermitNull(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
//        Object userObj =  redisTemplate.opsForValue().get(USER_LOGIN_STATE);
        UserEntity currentUser = (UserEntity) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            return null;
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        return this.getById(userId);
    }

    /**
     * 是否为管理员
     *
     * @param request
     * @return
     */
    @Override
    public boolean isAdmin(HttpServletRequest request) {
        // 仅管理员可查询
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
//        Object userObj = redisTemplate.opsForValue().get(USER_LOGIN_STATE);
        UserEntity user = (UserEntity) userObj;
        return isAdmin(user);
    }

    @Override
    public boolean isAdmin(UserEntity user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

    /**
     * 用户注销
     *
     * @param request
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        if (request.getSession().getAttribute(USER_LOGIN_STATE)== null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(USER_LOGIN_STATE);
//        redisTemplate.delete(USER_LOGIN_STATE);
        return true;
    }



    @Override
    public UserVO getUserVO(UserEntity user) {
        if (user == null) {
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user, userVO);
        return userVO;
    }

    @Override
    public List<UserVO> getUserVO(List<UserEntity> userList) {
        if (CollectionUtils.isEmpty(userList)) {
            return new ArrayList<>();
        }
        return userList.stream().map(this::getUserVO).collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<UserEntity> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String unionId = userQueryRequest.getUnionId();
        String mpOpenId = userQueryRequest.getMpOpenId();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(id != null, "id", id);
        queryWrapper.eq(StringUtils.isNotBlank(unionId), "unionId", unionId);
        queryWrapper.eq(StringUtils.isNotBlank(mpOpenId), "mpOpenId", mpOpenId);
        queryWrapper.eq(StringUtils.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StringUtils.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.like(StringUtils.isNotBlank(userName), "userName", userName);
        queryWrapper.orderBy(SqlUtils.validSortField(sortField), sortOrder.equals(CommonConstant.SORT_ORDER_ASC),
                sortField);
        return queryWrapper;
    }


}
